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EP3011395B1 - Classement de tâches d'impression en se basant sur une zone saine de support de transfert - Google Patents

Classement de tâches d'impression en se basant sur une zone saine de support de transfert Download PDF

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Publication number
EP3011395B1
EP3011395B1 EP13730562.9A EP13730562A EP3011395B1 EP 3011395 B1 EP3011395 B1 EP 3011395B1 EP 13730562 A EP13730562 A EP 13730562A EP 3011395 B1 EP3011395 B1 EP 3011395B1
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EP
European Patent Office
Prior art keywords
print
area
pda
processor
ira
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Application number
EP13730562.9A
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German (de)
English (en)
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EP3011395A1 (fr
Inventor
Gideon Amir
Dror Kella
Michel Assenheimer
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HP Indigo BV
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HP Indigo BV
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    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1223—Dedicated interfaces to print systems specifically adapted to use a particular technique
    • G06F3/1237—Print job management
    • G06F3/126—Job scheduling, e.g. queuing, determine appropriate device
    • G06F3/1263—Job scheduling, e.g. queuing, determine appropriate device based on job priority, e.g. re-arranging the order of jobs, e.g. the printing sequence
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/14—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base
    • G03G15/16—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer
    • G03G15/1605—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support
    • G03G15/1615—Apparatus for electrographic processes using a charge pattern for transferring a pattern to a second base of a toner pattern, e.g. a powder pattern, e.g. magnetic transfer using at least one intermediate support relating to the driving mechanism for the intermediate support, e.g. gears, couplings, belt tensioning
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/50—Machine control of apparatus for electrographic processes using a charge pattern, e.g. regulating differents parts of the machine, multimode copiers, microprocessor control
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G15/00—Apparatus for electrographic processes using a charge pattern
    • G03G15/55—Self-diagnostics; Malfunction or lifetime display
    • G03G15/553—Monitoring or warning means for exhaustion or lifetime end of consumables, e.g. indication of insufficient copy sheet quantity for a job
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1202—Dedicated interfaces to print systems specifically adapted to achieve a particular effect
    • G06F3/1203—Improving or facilitating administration, e.g. print management
    • G06F3/1208—Improving or facilitating administration, e.g. print management resulting in improved quality of the output result, e.g. print layout, colours, workflows, print preview
    • G—PHYSICS
    • G06—COMPUTING OR CALCULATING; COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/12—Digital output to print unit, e.g. line printer, chain printer
    • G06F3/1201—Dedicated interfaces to print systems
    • G06F3/1278—Dedicated interfaces to print systems specifically adapted to adopt a particular infrastructure
    • G06F3/1282—High volume printer device
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00025—Machine control, e.g. regulating different parts of the machine
    • G03G2215/00126—Multi-job machines
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00734—Detection of physical properties of sheet size
    • G—PHYSICS
    • G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
    • G03G—ELECTROGRAPHY; ELECTROPHOTOGRAPHY; MAGNETOGRAPHY
    • G03G2215/00—Apparatus for electrophotographic processes
    • G03G2215/00362—Apparatus for electrophotographic processes relating to the copy medium handling
    • G03G2215/00535—Stable handling of copy medium
    • G03G2215/00717—Detection of physical properties
    • G03G2215/00738—Detection of physical properties of sheet thickness or rigidity

Definitions

  • Some printing devices including liquid electro-photography (LEP) printing devices, employ image transfer media such as image transfer blankets.
  • An image transfer blanket receives images formed on a photo imaging member, or from an inkjet system or other digital means, and transfers the images onto print media, such as cut sheet media or a continuous media web.
  • Blanket wear mechanisms related to the printed images and the types of media substrates being used cause the blanket to wear.
  • the blanket wear increases and eventually appears as a defect on other printed images.
  • printing device operators often replace image transfer blankets at regular intervals once the number of printed images increases beyond a certain threshold level.
  • blanket wear begins to cause defects on the printed images prior to reaching the threshold, device operators are likely to replace the image transfer blanket even sooner.
  • replacing image transfer blankets is expensive and reduces printer output efficiency because of the time involved in the replacement.
  • Japanese Patent Application Publication No. 2001356647 (A ) relates to solving a problem of a temperature difference over a fixing roller in an image forming unit.
  • Japanese Patent Application Publication No. 2008268356 (A ) concerns an image forming apparatus including disposable toner pattern forming means and means for determining whether toner in a developing unit has deteriorated.
  • Japanese Patent Application Publication No. 2012037541 (A ) relates to rearranging print jobs in an image forming apparatus, based on shift and switch times of an optimum temperature.
  • Japanese Patent Application Publication No. 2010145636 (A ) describes an image forming apparatus including swelling out length detecting means.
  • US Patent Application Publication No. 2004234281 (A1 ) describes an image forming apparatus that notifies a user of unit replacement.
  • US Patent No. 6108499 discloses an electrophotographic imaging device that detects wear in its components.
  • US Patent Application Publication No. 20090297177 (A1 ) discloses an image forming device that calculates a usage value of a replaceable member and controls a timing of a replacement notification.
  • image transfer blankets used in printing devices are typically replaced on a periodic basis due to wear in the blankets caused by the repeated transfer of images onto print media and repeated interaction with media.
  • Blanket wear can cause defects in the transferred images, which in turn reduces overall print quality.
  • One common example of blanket wear is cut-marks that can develop on the blanket due to the sharp edges of the printed substrates (i.e., the print media).
  • the repeated pressing of the print media (e.g., paper) against the blanket causes the sharp edges of the media to cut into the blanket.
  • Embodiments of the present disclosure extend the useful lifespan of an image transfer blanket by prioritizing print jobs based on a healthy area of the blanket and the likelihood that each job will not result in visible print defects when printed.
  • Print jobs are ranked in a print order from a lowest to highest risk that they will display a blanket related print defect.
  • a job ranking algorithm evaluates historical blanket data to determine when damage (i.e., a defect) is likely to be present on the blanket. When the algorithm determines a high enough probability of damage to the blanket, the algorithm then calculates an area of the blanket that can be regarded as a healthy area.
  • the algorithm From a list of potential print jobs, the algorithm then generates a ranked print order that prioritizes each job based on a relative risk that the job will have a print quality problem given the blanket's present condition and healthy area.
  • the algorithm considers a second factor in generating the print order. The second factor considered is the potential for each print job to cause additional damage to the blanket and further reduce the size of the blanket's healthy area.
  • a processor-readable medium stores code representing instructions that when executed by a processor cause the processor to access a list of print jobs for printing.
  • the processor determines a healthy area of a transfer media. Then, for each job in the list, the processor calculates an image risk area (IRA) based on the healthy area. The processor then ranks each job in a print order according to its IRA.
  • IRA image risk area
  • a processor-readable medium stores code representing instructions that when executed by a processor cause the processor to calculate a healthy area of an image transfer blanket.
  • the processor then calculates an image risk area (IRA) as an amount of image area of a print job that falls outside of the healthy area of the image transfer blanket.
  • the processor then ranks the print job in a print order so that it is above other print jobs having larger IRAs and below other print jobs having smaller IRAs.
  • IRA image risk area
  • a processor-readable medium stores code representing instructions that when executed by a processor cause the processor to determine a healthy area of an image transfer blanket.
  • the processor accesses a list of print jobs, with each print job defining an image area.
  • the processor determines an image risk area (IRA) that defines an amount of the image area that falls outside of the healthy area, and a potential damage area (PDA) that defines an amount of the healthy area that is not covered by the image area.
  • the processor then ranks the print jobs in a print order based on the IRA and PDA of each print job. In one example, the processor first ranks the print jobs from smallest IRA to largest IRA, and where two or more print jobs have equivalent IRAs, the processor ranks the two or more print jobs from smallest PDA to largest PDA.
  • FIG. 1 illustrates an example of a printing device 100 suitable for implementing a print job ranking algorithm that prioritizes (i.e., ranks) print jobs into a printing order based on a healthy area of an image transfer blanket and the likelihood that each job will not incur visible print defects when printed.
  • the printing device 100 comprises a print-on-demand device, such as a liquid electro-photography (LEP) printer comprising an image transfer blanket (or other suitable image transfer media) that sustains wear from the repetitious transfer of images onto print media, as noted above.
  • a printing device 100 implemented as an LEP printer 100 includes a print engine 102 that receives print media 104 (e.g., cut-sheet paper) from a media input mechanism 106, and outputs printed media 108 to a media output mechanism 110.
  • print media 104 e.g., cut-sheet paper
  • the print engine 102 includes a photo imaging component, such as a photo imaging plate (PIP) 112 mounted on a drum or imaging cylinder 114.
  • the PIP 112 defines an outer surface of the imaging cylinder 114 on which images can be formed.
  • a charging component such as charge roller 116 generates electrical charge that flows toward the PIP surface and covers it with a uniform electrostatic charge.
  • a laser imaging unit 118 exposes image areas on the PIP 112, which dissipates (neutralizes) the charge in those areas. Exposure of the PIP creates a 'latent image' in the form of an invisible electrostatic charge pattern that replicates the image to be printed. In a digital LEP printing device 100, the image is created from digital image data that represents words, pages, text and images that can be created, for example, with electronic layout and/or desktop publishing programs.
  • a controller 120 uses digital image data to control the laser imaging unit 118 to selectively expose the PIP 112. Digital image data is generally formatted as one or more print jobs stored and executed on controller 120, as further discussed herein below.
  • Ink is then developed to the latent, electrostatic image on the PIP 112 by binary ink development (BID) rollers 122, forming an ink image on the outer surface of the PIP 112.
  • BID binary ink development
  • the ink image formed on the outer surface of the PIP 112 is electrically transferred to an image transfer blanket 124, which is electrically charged through an intermediate drum or transfer cylinder 126.
  • the image transfer blanket 124 overlies, and is securely attached to, the outer surface of the transfer cylinder 126.
  • the transfer cylinder 126 is configured to heat the blanket 124, which causes the liquid in the ink to evaporate and the solid particles to partially melt and blend together, forming a hot adhesive liquid plastic.
  • the heated ink image is then transferred to the print media 104, which is held by an impression cylinder 128.
  • the print media 104 is pinched between the impression cylinder 128 and the blanket 124 on the transfer cylinder 126. It is the repeated pressing of print media 104 by the impression cylinder 128 into the image transfer blanket 124 that creates wear on the blanket 124. More specifically, the repeated impressions of print media 104 into the blanket 124 results in permanent deformations and defects in the blanket 124 (e.g., cut-marks from print media edges) that can impact print quality.
  • the printed media 108 is transported by various rollers 132 to the output mechanism 110.
  • FIG. 2 shows a box diagram of a controller 120 suitable for implementing a print job ranking algorithm within an LEP printing device 100.
  • Controller 120 generally comprises a processor (CPU) 200 and a memory 202, and may additionally include firmware and other electronics for communicating with and controlling the other components of print engine 102, as well as media input and output mechanisms 106 and 110.
  • Memory 202 can include both volatile (i.e., RAM) and nonvolatile (e.g., ROM, hard disk, floppy disk, CD-ROM, etc.) memory components comprising non-transitory computer/processor-readable media that provide for the storage of computer/processor-readable coded instructions, data structures, program modules, JDF, and other data.
  • controller 120 uses digital image data to control the laser imaging unit 118 in the print engine 102 to selectively expose the PIP 112. More specifically, controller 120 receives print data 204 from a host system, such as a computer, and stores the data 204 in memory 202. Data 204 represents, for example, documents or image files to be printed. As such, data 204 forms one or more print jobs 206 for printing device 100 that each include print job commands and/or command parameters. Using a print job 206 from data 204, controller 120 controls components of print engine 102 (e.g., laser imaging unit 118) to form characters, symbols, and/or other graphics or images on print media 104.
  • print engine 102 e.g., laser imaging unit 118
  • controller 120 includes a print job ranking algorithm 208 stored in memory 202.
  • Print job ranking algorithm 208 comprises instructions executable on processor 200 to determine a ranked or prioritized order for printing available print jobs 206.
  • the algorithm 208 generates a ranked job print order list 210 that places the jobs in a prioritized order for printing.
  • the ranking algorithm 208 ranks each of the print jobs 206 in a prioritized print order based on one or two (or more) factors associated with a calculated healthy area 212 of the image transfer blanket 124.
  • the first factor is an image risk area (IRA) 214 calculated for each print job 206
  • the second factor is a potential damage area (PDA) 216, also calculated for each print job 206.
  • IRA image risk area
  • PDA potential damage area
  • FIG. 3 shows an example of an image transfer blanket 124 with a healthy area 300 and an image area 302 on which an image of a print job 206 is to be printed, according to one implementation.
  • the image area 302 is defined by the dashed line in FIG. 3 .
  • the image area 302 is assumed to be the same size as the print media 104 substrate area on which the image of a print job 206 is to be printed.
  • both the image area 302 and the print media 104 substrate are defined by the dashed line, as shown in FIG. 3 .
  • the image area 302 may be smaller than the print media 104 substrate area. In such cases, the size of an image from a print job 206 falls within the image area 302, but the image area 302 is smaller than the area of the print media 104 substrate and does not extend over the entire area of the print media 104 substrate.
  • the healthy area 300 shown in FIG. 3 represents a graphical illustration that corresponds with the healthy area 212 numerical value calculated and stored in the memory 202 as noted above regarding FIG. 2 .
  • the healthy area 300 of the blanket 124 represents an area of the blanket that is capable of transferring images from the PIP 112 to the print media 104 without transferring defects from the blanket 124 to the media 104.
  • areas outside of the healthy area 300 are unhealthy, and can result in defects being transferred to printed images.
  • unhealthy areas can also be confined within the healthy area 300. Such a confined unhealthy area might arise due to the constant printing of a label or other constant image. Therefore, the healthy area 300 may not always be a complete region, but may include within it, an unhealthy area.
  • the print job ranking algorithm 208 determines the healthy blanket area 300 based on the blanket's history data 218.
  • the blanket history data 218 comprises data for each of the print jobs previously printed on printing device 100.
  • FIG. 4 shows a table that contains an example of blanket history data 218.
  • Blanket history data 218 can include, for example, the lengths, widths, and thicknesses of previously printed pages, along with the number of impressions made on the blanket 124 by pages of varying dimensions.
  • the ranking algorithm 208 determines if there is a wear defect in the blanket 124 by calculating a cumulative thickness of print media 104 that has been impressed onto the blanket 124 for the various sizes and types of print media 104 previously printed by printing device 100. Wear is often manifest as cut-marks on the blanket 124 caused by the edges of the print media as the number of impressions increases. When the amount of wear exceeds a threshold for a given dimension on the blanket 124, a wear defect is determined to be present outside of that dimension, and the healthy area 300 is determined to be within that dimension.
  • FIGs. 5a, 5b, and 5c show example results of calculations made by the ranking algorithm 208 to determine the presence of a wear defect and the resulting dimensions of the healthy area 300 of the blanket 124.
  • Wear is the cumulative thickness of print media 104 that has been impressed onto the blanket 124, and is calculated as the thickness of the print media 104 multiplied by the impressions count.
  • the algorithm 208 considers a wear defect to be present when the wear exceeds a threshold, which in this example is 500,000 microns of accumulated thickness. In a first calculation, the algorithm determines if there is a wear defect based on the number of impressions made by media according to the media lengths. Thus, using the blanket history data 218 shown in FIG.
  • the algorithm 208 determines that for both the media lengths of 450mm (from print jobs 1 and 3) and 420mm (from print jobs 2, 4, and 5), the amount of wear exceeds the 500,000 threshold. Accordingly, as shown in FIG. 5a , wear defects are determined to be present at blanket lengths of 450mm and 420mm. That is, wear defects are determined to be present at lengths of 450mm and 420mm from the beginning point 301 ( FIG. 3 ) of the blanket. In a second similar calculation, using the blanket history data 218 shown in FIG. 4 , the algorithm determines if there is a wear defect based on the number of impressions made by media according to the media widths. As shown in FIG. 5b , a wear defect is determined to be present at a blanket width of 320mm (from print jobs 1 and 3), but not at widths of 297mm (from print jobs 2 and 5) and 266mm (from print job 4).
  • the dimensions of the healthy area 300 are then determined based on the length and width dimensions that are found to have wear defects. Specifically, the length of the healthy area 300 is determined to be the minimum length defect (i.e., 420mm) plus a tolerance for simplex jobs and duplex jobs. In this example, a simplex job tolerance is 3mm, and a duplex job tolerance is 10mm. Likewise, the width of the healthy area 300 is determined to be the minimum width defect (i.e., 320mm) plus a width tolerance. In this example, the width tolerance is 6mm. Accordingly, as shown in FIG. 5c , the healthy area 300 of the blanket 124 is determined to be a length of 423mm and width of 326mm for simplex print jobs, and a length of 430mm and width of 326mm for duplex print jobs.
  • an image risk area (IRA) 304, and a potential damage area (PDA) 306 are also shown.
  • the IRA 304 and PDA 306 shown in FIG. 3 represent graphical illustrations that correspond with IRA 214 and PDA 216 numerical values calculated and stored in the memory 202, as noted above regarding FIG. 2 .
  • the image area 302 and the print media 104 substrate area are assumed to be the same size, as shown by the dashed line.
  • the image area 302, print media 104 substrate area, IRA 304, and PDA 306 may vary, but within a given print job 206, the image area 302, print media 104 substrate area, IRA 304, and PDA 306 remain the same.
  • the IRA 304 (214 in FIG. 2 ), and PDA 306 (216 in FIG. 2 ), are the two factors whose values are calculated and considered by the ranking algorithm 208 to prioritize the print jobs 206 in a print order (i.e., a ranked job print order list 210).
  • the IRA 304 is the amount of image area 302 that falls on the blanket 124 outside of the healthy area 300 of the blanket.
  • the PDA 306 is the amount of the healthy area 300 of the blanket 124 that the image area 302 (print media 104 substrate) does not cover.
  • a print job 206 whose image area 302 does not cover the entire healthy area 300 of the blanket 124, creates the potential to cause additional damage to the blanket in the PDA 306, which can further reduce the size of the healthy area 300.
  • the ranking algorithm 208 calculates the IRA 304 and PDA 306 of a print job 206 using the image area 302 width (W) and length (L), and the healthy area 300 width (W HA ) and length (L HA ), as shown in FIG. 3 . Since the IRA 304 is the amount of image area 302 that falls outside of the healthy area 300 of the blanket 124, and the PDA 306 is the amount of the healthy area 300 of the blanket 124 that the image area 302 (print media 104 substrate area) does not cover, the IRA and PDA are readily calculated by algorithm 208 from equations as shown in the following table.
  • the ranking algorithm 208 sorts the print jobs first by the IRA 304 values, from the smallest IRA to the largest IRA. Thus, a ranked print order 210 is determined in which jobs with smaller IRA 304 values are ranked ahead of (and will be printed before) jobs with larger IRA 304 values. Where two or more print jobs 206 have an equivalent IRA 304 value that falls within a tolerance (e.g., a tolerance of 100mm 2 ), the algorithm next ranks or prioritizes those jobs amongst themselves based on their PDA 306 values. Jobs with equivalent IRA values are ranked so that jobs with smaller PDA values are ranked above jobs having larger PDA values.
  • a tolerance e.g., a tolerance of 100mm 2
  • the print jobs 206 will be ranked based on their IRA values alone, without resorting to the PDA values for ranking. If two or more print jobs 206 have both equivalent IRA 304 values and equivalent PDA 306 values (e.g., within a tolerance of 100mm 2 ), the algorithm 208 ranks the print jobs with the same priority such that their print order amongst themselves is irrelevant.
  • the ranked job print order list 210 enables the printing device 100 to continue printing on a partially defective image transfer blanket 124 with a reduced risk that the printed output will show defects from the blanket 124. This allows print operators to extend the lifespan of image transfer blankets, which reduces costs and improves printing efficiency.
  • FIGs. 6 , 7 , and 8 show flowcharts of example methods 600, 700, and 800, related to implementing a print job ranking algorithm that ranks print jobs into a printing order based on a healthy area of an image transfer blanket and the likelihood that each job will not incur visible print defects when printed.
  • Methods 600, 700, and 800 are associated with the example implementations discussed above with regard to FIGs. 1-6 , and details of the steps shown in methods 600, 700, and 800, can be found in the related discussion of such implementations.
  • the steps of methods 600, 700, and 800 may be embodied as programming instructions stored on a non-transitory computer/processor-readable medium, such as memory 202 of FIG. 2 .
  • the implementation of the steps of methods 600, 700, and 800 is achieved by the reading and execution of such programming instructions by a processor, such as processor 200 of FIG. 2 .
  • Methods 600, 700, and 800 may include more than one implementation, and different implementations of methods 600, 700, and 800, may not employ every step presented in the flowcharts. Therefore, while steps of methods 600, 700, and 800, are presented in a particular order within the flowcharts, the order of their presentation is not intended to be a limitation as to the order in which the steps may actually be implemented, or as to whether all of the steps may be implemented. For example, one implementation of method 600 might be achieved through the performance of a number of initial steps, without performing one or more subsequent steps, while another implementation of method 600 might be achieved through the performance of all of the steps.
  • method 600 begins at block 602, where the first step shown is to access a list of print jobs for printing. Such print jobs may be, for example, a group of print jobs stored in a memory of a printing device.
  • method 600 continues with determining a healthy area of a transfer media.
  • determining a healthy area of a transfer media includes calculating a cumulative thickness of print media that has been impressed upon an image transfer blanket.
  • An image risk area (IRA) is then calculated for each job in the list based on the healthy area, as shown at block 606.
  • Calculating the IRA comprises determining an amount of an image area (i.e., print media substrate) of a print job that falls outside of the healthy area.
  • the method 600 continues with ranking each job in a print order according to its IRA.
  • Ranking a print job comprises ranking the job in the print order from lowest IRA to highest IRA, where a job having the lowest IRA is ranked first in the print order and a job having the highest IRA is ranked last in the print order.
  • a potential damage area (PDA) is then calculated for each job in the list based on the healthy area, as shown at block 610.
  • Calculating a PDA comprises determining an amount of the healthy area that an image area (i.e., print media substrate) of a job does not cover.
  • the plurality of jobs is further ranked within the print order according to their PDAs.
  • Ranking the plurality of jobs with equivalent IRAs comprises ranking them in the print order from lowest PDA to highest PDA, where a job with the lowest PDA is ranked above a job with the highest PDA.
  • the method 600 concludes at block 614, with the step of controlling a printing device to print the print jobs from the list of print jobs according to the print order.
  • method 700 begins at block 702, where the first step shown is to calculate a healthy area of an image transfer blanket.
  • calculating a healthy area of an image transfer blanket comprises calculating wear as a cumulative thickness of print media printed on the image transfer blanket, determining that a defect is present in the image transfer blanket when the wear exceeds a threshold, and establishing a length dimension and width dimension of the healthy area based on lengths and widths of the print media whose cumulative thickness caused the wear to exceed the threshold.
  • the method 700 continues at block 704 with calculating an image risk area (IRA).
  • the IRA is as an amount of an image area of a print job that falls outside of the healthy area of the image transfer blanket.
  • the choice of which equation is used is determined by the differences in lengths and widths of the print job image area and the healthy area, as shown in the Table herein above.
  • the print job is ranked in a print order so that it is above other print jobs having larger IRAs and below other print jobs having smaller IRAs.
  • a potential damage area is calculated as an amount of the healthy area that is not covered by the image area of the print job (i.e., print media 104 substrate area).
  • x L HA , and, PDA
  • the choice of which equation is used is determined by the differences in lengths and widths of the print job image area and the healthy area, as shown in the Table herein above.
  • the print job is ranked above the second print job when the PDA is smaller than a PDA of the second print job; the print job is ranked below the second print job when the PDA is larger than the PDA of the second print job; and, the print job is ranked even with (i.e., the same as) the second print job when the PDA is the same as the PDA of the second print job.
  • method 800 begins at block 802, where the first step shown is to determine a healthy area of an image transfer blanket.
  • a list of print jobs is accessed. Each print job in the list define an image area.
  • an image risk area (IRA) is determined that defines an amount of the image area that falls outside of the healthy area, as shown at block 806.
  • a potential damage area (PDA) is determined that defines an amount of the healthy area that is not covered by the image area, as shown at block 808.
  • the print jobs are ranked in a print order based on the IRA and PDA of each print job. Ranking the print jobs based on the IRA and PDA comprises, first, ranking the print jobs from smallest IRA to largest IRA, and second, where two or more print jobs have equivalent IRAs, ranking the two or more print jobs from smallest PDA to largest PDA.

Landscapes

  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Human Computer Interaction (AREA)
  • General Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Accessory Devices And Overall Control Thereof (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Claims (13)

  1. Support lisible par processeur (202) stockant un code représentant des instructions qui, lorsqu'elles sont exécutées par un processeur, amènent le processeur (200) à :
    accéder à une liste de tâches d'impression (206) à imprimer ;
    déterminer une zone saine (212, 300) d'un support de transfert d'image (124) ;
    pour chaque tâche (206) de la liste, calculer une zone à risque d'une image (IRA) (214, 304) en fonction de la zone saine (212, 300) ; et
    classer chaque tâche (206) en ordre d'impression en fonction de son IRA (214, 304), caractérisé en ce que
    le calcul d'une IRA (214, 304) comprend la détermination d'une quantité de la zone d'image d'une tâche qui se trouve hors de la zone saine (212, 300), et
    le classement de chaque tâche (206) comprend le classement des tâches (206) dans un ordre d'impression allant de l'IRA la plus faible à l'IRA la plus élevée, dans lequel une tâche (206) dont l'IRA est la plus faible est classée première dans l'ordre d'impression et une tâche dont l'IRA est la plus élevée est classée dernière dans l'ordre d'impression.
  2. Support lisible par processeur (202) selon la revendication 1, dans lequel les instructions amènent en outre le processeur (200) à :
    pour chaque tâche (206) de la liste, calculer une zone d'endommagement potentiel (PDA) (216, 306) en fonction de la zone saine (212, 300) ; et
    lorsqu'une pluralité de tâches (206) présente des IRA équivalentes (214, 304), classer en outre la pluralité de tâches (206) au sein de l'ordre d'impression en fonction de leurs PDA (216, 306).
  3. Support lisible par processeur (202) selon la revendication 2, dans lequel le calcul d'une PDA (216, 306) comprend la détermination d'une quantité de la zone saine (212, 300) que la zone d'image d'une tâche ne couvre pas.
  4. Support lisible par processeur (202) selon la revendication 2, dans lequel le classement supplémentaire de la pluralité de tâches (206) en fonction de leurs PDA (216, 306) comprend le classement de la pluralité de tâches (206) dans l'ordre d'impression allant de la PDA la plus basse à la PDA la plus élevée, dans lequel une tâche présentant la PDA la plus basse est classée au-dessus d'une tâche dont la PDA présentant la plus élevée.
  5. Support lisible par processeur (202) selon la revendication 1, dans lequel la détermination d'une zone saine (212, 300) d'un support de transfert (124) comprend :
    le calcul d'une épaisseur cumulée de supports d'impression (104) qui ont été empreints sur un blanchet de transfert d'image (124).
  6. Support lisible par processeur (202) selon la revendication 1, dans lequel les instructions amènent en outre le processeur (200) à :
    commander un dispositif d'impression (100) afin qu'il imprime les tâches d'impression (206) de la liste des tâches d'impression en fonction de l'ordre d'impression.
  7. Support lisible par processeur (202) stockant un code représentant des instructions qui, lorsqu'elles sont exécutées par un processeur (200), amènent le processeur (200) à :
    calculer une zone saine (212, 200) d'un blanchet de transfert d'image (124) ;
    caractérisé en ce que les instructions, lorsqu'elles sont exécutées par le processeur (200), amènent en outre le processeur (200) à calculer une zone à risque d'une image (IRA) (214, 304) en tant que quantité de zone d'image d'une tâche d'impression qui se trouve hors de la zone saine (212, 300) du blanchet de transfert d'image (124) ; et
    classer la tâche d'impression (206) au sein d'un ordre d'impression de telle manière qu'elle est au-dessus d'autres tâches d'impression présentant de plus grandes IRA et au-dessous d'autres tâches d'impression présentant de plus petites IRA.
  8. Support lisible par processeur (202) selon la revendication 7, dans lequel les instructions amènent en outre le processeur (200) à :
    calculer une zone d'endommagement potentiel (PDA) (216, 306) en tant que quantité de la zone saine (212, 300) non couverte par la zone d'image de la tâche d'impression (206) ; et
    si l'IRA de la tâche d'impression est identique à l'IRA d'une seconde tâche d'impression, classer la tâche d'impression au-dessus de la seconde tâche d'impression lorsque la PDA est moindre qu'une PDA de la seconde tâche d'impression, au-dessous de la seconde tâche d'impression lorsque la PDA est supérieure à la PDA de la seconde tâche d'impression, et au même niveau que la seconde tâche d'impression lorsque la PDA est identique à la PDA de la seconde tâche d'impression.
  9. Support lisible par processeur (202) selon la revendication 7, dans lequel le calcul d'une zone saine (212, 300) comprend :
    le calcul de l'usure en tant qu'épaisseur cumulée de supports d'impression (104) imprimés sur le blanchet de transfert d'image (124) ;
    la détermination d'un défaut dans le blanchet de transfert d'image (214) lorsque l'usure dépasse un seuil ; et
    l'établissement d'une dimension en longueur et d'une dimension en largeur de la zone saine (212, 300) en fonction des longueurs et largeurs de supports d'impression (104) dont l'épaisseur cumulée a amené le dépassement du seuil par l'usure.
  10. Support lisible par processeur (202) selon la revendication 7, dans lequel la zone d'image de la tâche d'impression présente une largeur W et une longueur L, et la zone saine (212, 300) présente une largeur WHA et une longueur LHA, et l'IRA (214, 304) est calculée à partir d'une équation choisie dans le groupe constitué de IRA = 0, IRA = (WHA × LHA) - (W × L), IRA = (L - LHA) × W, et IRA = (W - WHA) × L.
  11. Support lisible par processeur (202) selon la revendication 8, dans lequel la zone d'image de la tâche d'impression présente une largeur W et une longueur L, et la zone saine (212, 300) présente une largeur WHA et une longueur LHA, et la PDA (216, 306) est calculée à partir d'une équation choisie dans le groupe constitué de PDA = 0, PDA = (WHA × LHA) - (W × L), PDA = |W - WHA| × LHA, et PDA = |L - LHA| × WHA.
  12. Support lisible par processeur (202) stockant un code représentant des instructions qui, lorsqu'elles sont exécutées par un processeur (200), amènent le processeur (200) à :
    déterminer une zone saine (212, 300) d'un blanchet de transfert d'image (124) ;
    accéder à une liste de tâches d'impression (206), chaque tâche d'impression (206) définissant une zone d'image (302) ;
    déterminer, pour chaque tâche d'impression, la zone à risque d'une image (IRA) (304, 214) qui définit une quantité de la zone d'image (302) qui se trouve hors de la zone saine (212, 300) ;
    caractérisé en ce que les instructions, lorsqu'elles sont exécutées par le processeur (200), amènent en outre le processeur (200) à déterminer,
    pour chaque tâche d'impression, une zone d'endommagement potentiel (PDA) (216, 306) qui définit une quantité de la zone saine (212, 300) non couverte par la zone d'image (302) ; et
    classer les tâches d'impression (206) dans un ordre d'impression en fonction de l'IRA (214, 304) et de la PDA (216, 306) de chaque tâche d'impression (206).
  13. Support lisible par processeur (202) selon la revendication 11, dans lequel le classement des tâches d'impression (206) dans un ordre d'impression en fonction de l'IRA (214, 304) et de la PDA (216, 306) de chaque tâche d'impression (206) comprend :
    premièrement, le classement des tâches d'impression (206) de la plus petite IRA à la plus grande IRA ; et
    deuxièmement, lorsque deux ou plusieurs tâches d'impression présentent des IRA équivalentes, le classement des deux ou plusieurs tâches d'impression de la plus petite PDA à la plus grande PDA.
EP13730562.9A 2013-06-19 2013-06-19 Classement de tâches d'impression en se basant sur une zone saine de support de transfert Active EP3011395B1 (fr)

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Publication number Publication date
CN105579915A (zh) 2016-05-11
US20170123742A1 (en) 2017-05-04
US20160139864A1 (en) 2016-05-19
US9740446B2 (en) 2017-08-22
US9535641B2 (en) 2017-01-03
EP3011395A1 (fr) 2016-04-27
WO2014202138A1 (fr) 2014-12-24
CN105579915B (zh) 2018-12-18

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